What are the words to write the nouns of raindrops, moving train & scribble w/ pencil in black and white figuratively?

Question:Like the sound of clock is Tick tock tick tock tick tock
The nouns of a mouse is Click click
The sound of snake is whooooooooshhh!

How do you write some other sounds?

Answers:
The "pitter patter" of raindrops
The "chugging" of a train
The "scratching" od a pencil on paper...

Source(s):
on·o·mat·o·poe·ia( P ) Pronunciation Key (n-mt-p, -m"at-)
n.
The formation or use of words such as buzz or murmur that try to be like the sounds associated with the objects or whereabouts they refer to.

Source(s):
on·o·mat·o·poe·ia( P ) Pronunciation Key (n-mt-p, -m"at-)
n.
The formation or use of words such as buzz or murmur that impersonate the sounds associated with the objects or engagements they refer to.
slow precipitation plip plop, heavy precipitation kursssh,moving train fufufufufufufuf,pencil ssseeeeee,
and thanks that be entertaining to figure out. raindrops- tip hit tip tap